diff --git a/composer.json b/composer.json
index 0d1071c..fe4bc42 100644
--- a/composer.json
+++ b/composer.json
@@ -54,7 +54,7 @@
 		"phpmd/phpmd": "^2.7",
 		"phpstan/phpstan": "^1.11",
 		"pronamic/pronamic-cli": "^1.0",
-		"pronamic/wp-coding-standards": "^1.3",
+		"pronamic/wp-coding-standards": "^2.4",
 		"roots/wordpress": "^6.0",
 		"szepeviktor/phpstan-wordpress": "^1.3",
 		"vimeo/psalm": "^5.25",
diff --git a/src/Gateway.php b/src/Gateway.php
index 085d251..e4717f9 100644
--- a/src/Gateway.php
+++ b/src/Gateway.php
@@ -63,6 +63,7 @@ public function __construct( Config $config ) {
 		$this->register_payment_method( new PaymentMethod( Core_PaymentMethods::MASTERCARD ) );
 		$this->register_payment_method( new PaymentMethod( Core_PaymentMethods::PAYPAL ) );
 		$this->register_payment_method( new PaymentMethod( Core_PaymentMethods::SOFORT ) );
+		$this->register_payment_method( new PaymentMethod( Core_PaymentMethods::TRUSTLY ) );
 		$this->register_payment_method( new PaymentMethod( Core_PaymentMethods::V_PAY ) );
 		$this->register_payment_method( new PaymentMethod( Core_PaymentMethods::VISA ) );
 	}
@@ -475,6 +476,36 @@ public function start( Payment $payment ) {
 
 				break;
 			/**
+			 * Payment method Trustly.
+			 *
+			 * @link https://dev.buckaroo.nl/PaymentMethods/Description/trustly#pay
+			 */
+			case Core_PaymentMethods::TRUSTLY:
+				$data->Services->ServiceList[] = (object) [
+					'Action'     => 'Pay',
+					'Name'       => 'Trustly',
+					'Parameters' => [
+						(object) [
+							'Name'  => 'CustomerFirstName',
+							'Value' => $customer?->get_name()?->get_first_name(),
+						],
+						(object) [
+							'Name'  => 'CustomerLastName',
+							'Value' => $customer?->get_name()?->get_last_name(),
+						],
+						(object) [
+							'Name'  => 'CustomerCountryCode',
+							'Value' => $payment->get_billing_address()?->get_country()?->get_code(),
+						],
+						(object) [
+							'Name'  => 'consumeremail',
+							'Value' => $customer?->get_email(),
+						],
+					],
+				];
+
+				break;
+			/**
 			 * Payment method V PAY.
 			 *
 			 * @link https://dev.buckaroo.nl/PaymentMethods/Description/creditcards#top